Machine



3 Sheets-Sheet 1'.

(No Model.)

A. B, LINDNER. SEWING MACHINE.

No. 516,020. Patented Mar. 6, 1894.

WITNESSES b INVENTOH o I z V449 Jim 3W 3 q) x I Q By I Wflu a mfu I M ATTORNEYS,

3 Sheets-Sheet 2.

(No Model.)

' A. E. LINDNER.

SEWING MACHINE.

No. 516.020. Patented Mar. 6, 1894.

.l mun N ms" WITNESSES; A. II! l I ll lNVENTOB A ron/v5 rs.

(N0 Modem 3 SheetsSheet 3. A. E. LINDNER. SEWING MACHINE Patented Mar. 6, 1894.

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ATTORNEYS.

TH: NATOHAL umaaslrmun coMPAnY.

UNITED STATES FFIG.

PATENT ARTHUR E. LINDNER, OF BROOKLYN, ASSIGNOR OF ONE-HALF TO JULIUS KAYSER, OF NEW YORK, N. Y.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 516,020, dated March 6, 1894:.

Application filed May 25, 1893.

To all whom it may concern.-

Be it known that I, ARTHUR E. LINDNER, a sub ect of the Emperor of Germany, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Sewing-Ma- $111168, of which the following is a specificaion.

This invention relates to improvements in sewing-machines, and especially to that class of sewing-machines that is known as chainstitch machines; and the object of my invention is to provide a sewing-machine that is so constructed that it can be used with one or two needles and the loop made with the thread lengthened so as to give the row of stitches a handsome appearance and also to permitthe bringin g of two rows of stitches closer together, or of interlocking two rows of stitches.

The invention consists in a sewing-machine constructed with loop-taker levers mounted below the bed-plate to swing toward and from each other and also to swing in a plane at right-angles to the one in which they swing toward or from each other.

The invention also consists in the constructron and combinatiom of parts and details which will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is a side-view of my improved sewing-machine, the bed-plate being in longitudinal section. Fig. 2 is a detail View of the needle and looptaker in different position, parts of the bedplate being in section. Fig. 3 is a plan-view of the under side of the mechanism under the bed-plate of the sewing-machine. Fig. 4 is an end-view of the mechanism above and below the bed-plate, parts being in section. Fig. 5 is a transverse sectional view, on line 5 5,Fig.1. Fig. 6 is a vertical transverse section, on line 6 6, of Fig. 1. Fig. 7 is a View of one of the stitches as made with a single needle. Fig. 8 shows the same spread. Fig. 9 represents a row of single stitches. Fig. 10 shows two stitches made with two needles with the looptaker in closed position, and which stitches are to interlock. Fig. 11 shows a loop taker spread for the purpose of interlocking the $erial No. 455,420. (No model-l stitches. Fig. 12 shows the two rows of stitches interlocked. Fig. 13 shows the formation of two rows of stitches that do not interlock, the loop-takers being spread, and Fig. 14 shows a double row of stitches made at the same time and not interlocked.

Similar letters of reference indicate corresponding parts.

The machine is constructed with a bedplate A supporting the standard A, on which is pivoted the vibrating arm A that operates avertically-reciprocating needle-bar B guided in the head A on the end of the arm of the standard A. The vibrating arm A is operated in the usual manner by the connecting rod 0 from the main driving-shaft D provided at one end with a belt-pulley D. The needleplate E inserted in the base-plate A is provided with two needle-holes e. In arms F F projectingfrom the underside of thebase-plate Aan axially rocking shaftF is mounted,which shaft is provided at one end with an arm G that is held in position on the shaft of a screw G, so as to permit of loosening said arm and adjusting it at a different inclination on said rocking-shaft F as may be necessary for the different kinds of stitches. On the end of the arm G an anti-friction roller G is mounted that runs on the rim of the cam H fixed on the main shaft D. The rocking-shaft F has an arm F to the free end of which one end of a helical spring I is connected, the other end of said spring being connected with the under side of the bed-plate A, so that said spring serves to press the roller G on the end of the arm G against the rim of the cam 11 and hold it in contacttherewith. The result is that the shaftD rotates the parts of the cam having a greater diameter to press said arm G downward and rock the shaft F,

and that part of the cam H having less diameter permits said arm G to swing upward under the action of the spring I. On the other end of the rocking-shaft F opposite the one carrying the arm G, a plate J is fastened by the screws J passing through slots J of said plate into the shaft F, the shaft being recessed to receive said plate, as shown in Fig. e. Two crossed levers K are pivoted by a screw K on the front of the plate J and between them a stop-pin K projects from the upper part of said plate. One of the levers K 1s connected below the pivot-screw K by a connecting-bar L with a cross-piece M on the end of a sleeve N mounted on the rocking-shaft F in such a manner that it can slide on and turn with the same. A connecting bar L connects the other lever K above the pivot-screw K with the upper end of the cross-piece M, so that whenever the sleeve N is moved in the direction of its length the levers K will be moved in opposite direction that is, either to or from each other. Said connecting-bars L and L can be adjusted in length so as to give the lever K greater or less throw. For this purpose the lever L is made of two sections, of which one is slotted, said sections being united by a screw Z passed through a slot. The bar L can be adjusted in the same manner or it can be provided with two holes Z as shown. A spring 0 has one end fastened to the lower end of one of the levers K and the other to a pin on the bottom edge of the plate J. The plate J is provided with an arm P, on which one end of a cross-piece M slides for the purpose of guiding said cross-piece. A spring Q has one end attached to the sleeve N and the other end to a pin Q on the rockingshaft F, which spring Q, serves for pressing the inner edge of the top part of the crosspiece M against the side of a pulley R fixed on the main shaft D and having a cam projection R on its side, so that when the main shaft D is rotated said cam-projection R acting on the cross-piece M of the sleeve N, pushes said sleeve to the left, the spring Q drawing said sleeve to the right when the cross-piece M encounters the narrower part of the pulley, that is, the part not provided with the cam-projection. As the sleeve N is pushed to the left (Fig. 1) by the cam-projection R, the upper ends of the loop-taker levers K are moved from each other, as shown in Fig. 2, and when said sleeve moves to the left said levers K are moved toward each other, that is, closed. The levers K are reduced toward their upper ends and have their upper ends bent up so as to form loop-takers S.

The operation is as followsz-As the main shaft D rotates the plate J and the loop-takers S on the same are rocked forward and backward transversely to the plate, and at the same time the plate J is moved by means of the cam-pulley R to the right and left parallel to the plane of Fig. 1. When only a single row of stitches is to be made, as shown in Figs. 7, 8 and 9, only one needle W is used and the arm G is so adjusted on the rockingshaft F that when the thread has been passed through the fabric and the needle moved upward and a loop formed below the plate A, the two loop-takers S together swing to the front, as indicated by the arrow 00, Fig. 4, and

pass through the loop and draw the same to the front and at the same time move from each other, so as to draw in more thread to form said loop. The next stitch passes into the loop thus formed, as shown in Fig. 9, and thereby a single row of loop-stitches is formed, but the loops are drawn lengthwise and also widened so as to give the stitch a handsomer appearance. WVhen the stitches formed with two needles are to interlock, the loop-takers must be so adjusted as to stretch the thread below the fabric to form two irregular triangles a and b (Fig. 11) on the upper surface, so that the needles of the second stitch pass through the corners of the triangles 0 formed by the intersection of the longer side of the triangles a. and b, as shown in Figs. 11 and 12. In case it is desired to use two needles and to form two independent rows of stitches which do not interlock, the loop-takers must be so adjusted that the two triangles ct and b are formed with sides slightly longer than those in Fig. 11, but in this case the arm G must be so adjusted that the needles do not pass through the lower corners of the triangles 0 formed by the intersection of the longer sides of the triangles a and b, but must each pass through a separate triangle d formed with the outer side to the triangles a and b and the intersecting sides of said triangles, as shown in Fig. 18. For the purpose of adjusting the mechanism in the manner thus described, the arm Ghas been made adjustable. It can easily be set so that the looptakers begin to move forward as the needles rise and to separate when the needle is in its highest position and to close when the needles move downward and to move the back of the needles, before the same pierce the fabric.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A sewing-machine, constructed with a loop-taker, composed of two levers mounted to swing toward and from each other and also to swing together in a direction at right-angles to the plane in which they swing toward and from each other, substantially as set forth.

2. A sewing-machine, constructed with a rocking-shaft below the bed-plate, a plate 011 said rocking-shaft mounted to rock therewith, a sleeve on said rocking-shaft, a cam on the main shaft of the machine for rocking said rocking-shaft a cam on the main shaft of the machine for reciprocating the sleeve on the rocking-shaft and crossed pivoted loop-taker levers pivoted on. said plate and connected with the sleeve, substantially as set forth.

3. A sewing-machine, constructed with a rocking-shaft below the bed-plate, an arm on said shaft, aspring acting on said arm a cam on the main shaft of the machine, an arm on the rocking-shaft, on which arm the said cam acts, a'plate on the rocking-shaft,two crossed In testimony that I claim the foregoing as pivojzed loop-taker levers pivoted on said my inventionI have signed my name in pres plat e, a sliding sleeve on the rocking-shaft,a ence of twosubscribing Witnesses.

cam on the main shaft), for reciprocating said ARTHUR E. LINDNER. 5 sleeve, and links connecting the sleeve with Witnesses:

the crossed pivoted loop-taker levers, substan- OSCAR F. GUNZ,

man as set forth. CHARLES SCHROEDER. 

